Sir, In former letters I have had the honor to mention to you the conversation, which had passed between the Saxon Minister at this Court and myself, on the subject of forming commercial and amicable connexions between the United States and the Elector. As I had no authority or instructions from Congress, I could only avail myself of general expressions of the desire of my constituents to cultivate the friendship of the different powers of Europe, and of extending their commerce to all. I declined when pressed, to give my sentiments in writing, unless the Saxon Minister would give me, by permission of his Court, such extracts of his official letters as might enable me immediately to notify to Congress in a proper manner, the amicable disposition of his master; assuring him, however, that I should not fail of communicating to that body the substance of our general conversations, which I was persuaded would receive with great satisfaction an account of the Elector's friendly intentions. This gentleman being rather indiscreet in his conduct, I was perhaps more upon my guard with him than I should have been with a person of a different character. On his pressing me, however, to give him my sentiments on the best means to forward an intercourse between the two countries, I replied verbally, that in my opinion, the speediest and most effectual method would be, to send from Saxony to America a person well acquainted with the commerce of his own country, and properly authorised, who being able to judge on the spot what advantages were to be derived from such intercourse, might immediately treat with Congress if the Elector thought proper. After some hesitation, he agreed to my propositions, and advised his Court thereof. Yesterday he addressed me a letter, of which I have now the honor to enclose you a copy, together with an extract of his official despatches. A visit which he paid me a few hours after he sent me the above papers, rendered a written answer unnecessary. I confessed to him, the high sense which Congress would have of this proof of the Elector's good will, and added, that I would take the earliest opportunity of communicating it. I promised him also the letters he required for M. Thieriot. I hope my conduct will have the approbation of Congress. Nothing material has transpired since my last of the 25th instant, except that I am persuaded, that the convention between France, Spain, and Portugal was signed here between the 15th and 17th of this month. I am told, that it has for its basis a treaty concluded between the two latter nations in 1778, with supplementary secret articles. The northern powers, particularly Russia, appear jealous of the objects of this treaty. Great Britain seems to have had no knowledge of it. I have the honor to be, &c. WILLIAM CARMICHAEL. * * * * * TO ROBERT R. LIVINGSTON.